Table 1.

Demographic Characteristics of the Studied Patients by Gender, Residence Area and Family History

Variables		Number	Percent
Gender	Male	43	24.3
	Female	134	75.7
Residence area	Tehran	61	35.6
	Isfahan	15	8.5
	Mazandaran	15	8.5
	Other provinces	60	32.7
	Unknown	26	14.7
Family history	First-degree relatives	8	4.5
	Second-degree relatives	21	11.9
	Total family history	29	16.4
Total		177	100